<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="头像">
      </div>
      <!-- 登录表单 -->
      <el-form label-width="0px" ref="loginFormRef" :model="loginForm" :rules="loginFormRules" class="login_from">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Login',
  data () {
    return {
      loginForm: {
        username: 'admin',
        password: '123456',
      },
      // 表单的验证规则
      loginFormRules: {
        username: [  // 用户名验证
          { required: true, message: '请输入用户名！', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符！', trigger: 'blur' }
        ],
        password: [  // 密码验证
          { required: true, message: '请输入密码！', trigger: 'blur' },
        ],
      }
    }
  },
  methods: {
    // 重置按钮逻辑
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields();
    },
    // 登录按钮逻辑
    login () {
      // 登录预验证
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: result } = await this.$http.post('login', this.loginForm);
        if (result.meta.status !== 200) {
          return this.$message.error('登陆失败！')
        }
        this.$message.success('登陆成功！')
        // 将 token 保存到客户端的 sessionStorege 中
        window.sessionStorage.setItem('token', result.data.token);
        // 路由跳转到 home 页
        this.$router.push('/home')
      });
    }
  }
}
</script>
 
<style lang="less" scoped>
.login_container {
  background-color: #5585b5;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 5px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    width: 130px;
    height: 130px;
    border: 1px solid orange;
    border-radius: 50%;
    padding: 5px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #eee;

    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }

  .login_from {
    width: 100%;
    position: absolute;
    bottom: 0;
    right: 0;
    padding: 0 20px;
    box-sizing: border-box;
  }
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>